The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 24-240mm F3.5-6.3 OSS and the Tamron AF 18-250mm f3.5-6.3 II LD for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sony FE 24-240mm F3.5-6.3 OSS is the longer of the two lenses at 119mm. The Tamron AF 18-250mm f3.5-6.3 II LD with a length of 84mm, is 35mm shorter. Besides being longer, the Sony FE 24-240mm F3.5-6.3 OSS also has a larger diameter of 81mm compared to the Tamron AF 18-250mm f3.5-6.3 II LD's 74mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Tamron AF 18-250mm f3.5-6.3 II LD weighs 430g, 44% (350g) lighter than the Sony FE 24-240mm F3.5-6.3 OSS's weight of 780g.
Filter Threads
The Sony FE 24-240mm F3.5-6.3 OSS has a filter size of 72mm whereas the Tamron AF 18-250mm f3.5-6.3 II LD has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Sony FE 24-240mm F3.5-6.3 OSS:
And these are the 62mm filters that we recommend for the Tamron AF 18-250mm f3.5-6.3 II LD:
Lens Mounts
The Sony FE 24-240mm F3.5-6.3 OSS has the Sony E lens mount whereas the Tamron AF 18-250mm f3.5-6.3 II LD has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron AF 18-250mm f3.5-6.3 II LD is also available in Canon EF , Nikon F (DX) and Sony Alpha mounts.
Focal Range
Sony FE 24-240mm F3.5-6.3 OSS has a focal range of 24-240mm and
10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36 - 360mm.
On the other hand, the Tamron AF 18-250mm f3.5-6.3 II LD has a focal range of 18-250mm and 13.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-375mm when used on a APS-C / DX format camera.
